And, of course, it didn??™t hurt that it was free, available at the right time, and did
what needed to be done.
Configuring sendmail is complex because the world is complex. It is dynamic
because the world is dynamic. Someday sendmail, like X11, will die??”but I??™m not
holding my breath. In the meantime, perhaps this book will help.
When I started reviewing Bryan??™s first-edition manuscript, I had been avoiding any
major work on sendmail. But then I started reading about various petty bugs and
annoyances that all seemed easy to fix. So I started making small fixes, then larger
ones; then I went through RFC1123 to bring the specs up-to-date, cleaned up a
bunch of 8-bit problems, and added ESMTP. It would be fair to say that the first
book and sendmail Version 8 fed on each other??”each improving the other.
Organization
We??™ve divided this book into an introduction and two parts, each part addressing a
particular aspect of sendmail.
Chapter 1, Some Basics, will be of special help to the new user. It covers the basic
concepts underlying mail delivery and the roles sendmail plays in that delivery.
Part I, Administration, covers all aspects of handling sendmail, from downloading
and installing new releases to managing mailing lists and aliases.
Part II, Configuration Reference, contains a heavily cross-referenced guide for configuring
and tuning sendmail.
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